Display screen or portion thereof with an animated graphical user interface



FIG. 1 is a front view of a first image in a sequence for a displayscreen or portion thereof with an animated graphical user interfaceshowing the new design;

FIG. 2 is a front view of a second image thereof;

FIG. 3 is a front view of a third image thereof;

FIG. 4 is a front view of a fourth image thereof;

FIG. 5 is a front view of a fifth image thereof;

FIG. 6 is a front view of a sixth image thereof; and,

FIG. 7 is a front view of a seventh image thereof.

The appearance of the animated graphical user interface sequentiallytransitions between images shown in FIGS. 1 through 7. The process orperiod in which one image transitions to another image forms no part ofthe claimed design.

The broken lines showing the display screen or portion thereof, thevertical and diagonal edges of cubes, and the textual and graphicalrepresentations within the cubes illustrate unclaimed environment andform no part of the claimed design.

CLAIM The ornamental design for a display screen or portion thereof withan animated graphical user interface, as shown and described.